rename libc name; comment out default toolchain

.build.yml

@@ -10,9 +10,9 @@ tasks:
       curl -L https://github.com/bazelbuild/bazelisk/releases/download/v1.9.0/bazelisk-linux-amd64 \
         -o bazel
       chmod +x bazel
-  - test_default: |
-      cd bazel-zig-cc; ../bazel run \
-        //test:gognu
+  #- test_default: |
+  #    cd bazel-zig-cc; ../bazel run \
+  #      //test:gognu
   - test_x86_64-linux-gnu: |
       cd bazel-zig-cc; ../bazel run \
         --platforms @zig_sdk//:x86_64-linux-gnu \

test/BUILD

@@ -19,7 +19,7 @@ go_binary(
     embed = [":go_lib"],
     static = "on",
     target_compatible_with = select({
-        "@platforms//os:linux": ["@zig_sdk//:musl"],
+        "@platforms//os:linux": ["@zig_sdk//:libc_musl"],
         "//conditions:default": [],
     }),
     visibility = ["//visibility:public"],

toolchain/defs.bzl

@@ -54,7 +54,7 @@ TARGET_CONFIGS_LISTOFLISTS = [[
         constraint_values=[
             "@platforms//os:linux",
             "@platforms//cpu:{}".format(cpu),
-            ":gnu.2.19",
+            ":libc_gnu",
         ],
         tool_paths={"ld": "ld.lld"},
     ),
@@ -72,7 +72,7 @@ TARGET_CONFIGS_LISTOFLISTS = [[
         constraint_values=[
             "@platforms//os:linux",
             "@platforms//cpu:{}".format(cpu),
-            ":musl",
+            ":libc_musl",
         ],
         tool_paths={"ld": "ld.lld"},
     ),
@@ -189,12 +189,12 @@ def zig_build_macro(absolute_path, zig_include_root):
     native.constraint_setting(name = "libc")
 
     native.constraint_value(
-        name = "musl",
+        name = "libc_musl",
         constraint_setting = ":libc",
     )
 
     native.constraint_value(
-        name = "gnu.2.19",
+        name = "libc_gnu",
         constraint_setting = ":libc",
     )